Question

Mr Harris is tiling his bathroom floor. The bathroom floor is a rectangle measuring 4m by 2m. Each tile is 20cm by 20cm how many tiles does he need

Answer 1

Step-by-step explanation:

1 m = 100 cm

8 ×100 = 800

800÷20 = 40

40 tiles need .

Answer 2

200 tiles are needed for Mr Harris to tiling his bathroom floor

Solution:

Given that,

The bathroom floor is a rectangle measuring 4m by 2m

Length = 4 meter

Width = 2 meter

Find Area of rectangle:

$\text{Area of rectangle } = length \times width\\\\\text{Area of rectangle } = 4 \times 2 \\\\\text{Area of rectangle } = 8\ m^2$

Convert to cm

$1\ m^2 = 10000\ cm \\\\8\ m^2 = 8 \times 10000 = 80000\ cm^2$

Each tile is 20cm by 20cm

Find area of each tiles

$\text{Area of each tile } = 20 \times 20 \\\\\text{Area of each tile } = 400\ cm^2$

Find the number of tiles

$\text{Number of tiles } = \frac{ \text{Area of rectangle }}{ \text{ Area of tile }} \\\\\ \text{Number of tiles } = \frac{ 80000}{400} \\\\\text{Number of tiles } = 200$

Thus 200 tiles are needed

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